go-macaroon-bakery/macaroon-bakery — pull request #23 by rogpeppe (2014-12-19 17:47:21+00:00)
Title: bakery: add support for need-declared third party caveat

This makes it possible to add a third-party caveat that requires
some declared caveats and be assured that (as long as they're
using the bakery package) they will be added.